With more half ton diesel options out there (GM incoming soon) it's hard not to consider something else given the problems the EcoDiesel has presented since launch. I'd only consider another one again IF I have a full warranty. It's just to expensive to work on and/or fix.
Sometimes it just makes sense to trade up if the diesel doesn't fit your needs anymore. I've looked at a new GM 6.2L Halfton but it's hard to get away from the diesel engine. Love the sound and power!